Is a Second Bathroom Worth It? A Practical Guide
A second bathroom sounds like a clear upgrade. In practice, adding one requires giving up space from somewhere else, and that tradeoff is not always worth it.
The decision depends heavily on how many people share the apartment, the specific layout, and whether the space being converted would be genuinely missed.
A clear-eyed look at when a second bathroom is worth the cost and sacrifice, and when it is not.
When a second bathroom is genuinely worth it
Three or more people sharing one bathroom
A single bathroom in a household of three or more adults creates real daily friction. Morning routines, guests who need to get ready simultaneously, the logistics of shared space — these are genuine quality-of-life issues that a second bathroom solves directly.
When guests frequently stay over
A separate guest bathroom solves the privacy awkwardness of sharing a bathroom used for bathing and toiletries. Even a half-bath (toilet and sink only) makes a meaningful difference for overnight guests.
En-suite for the primary bedroom
An en-suite bathroom changes how the primary bedroom functions. It adds a meaningful private zone and is the most common bathroom addition in apartment renovations.
The space you are giving up
A functional bathroom requires a minimum of around 3–4sqm. That space has to come from somewhere — typically a large closet, part of a bedroom, or a storage area. Before committing, understand exactly which space is being converted and what you lose with it.
Converting a closet
A large built-in closet (4sqm+) can become a half-bath with toilet and sink. The result is a tight but functional space. The loss of that storage must be compensated elsewhere — if there is nowhere to put what was stored, the bathroom is not a net gain.
Taking space from a bedroom
Reducing a bedroom by 3–4sqm to create an en-suite changes how the bedroom functions. If the bedroom is already small, this can make it genuinely uncomfortable. A bedroom of 12sqm with an en-suite is better than a 9sqm bedroom with one.
Utility rooms and storage areas
These are often the best candidates for bathroom conversion. Losing utility storage is easier to compensate for than losing bedroom space.
The real cost of adding a bathroom
Adding a bathroom involves: waterproofing, plumbing extension from existing stack, electrical, ventilation, tiling, and fixtures. This is one of the most infrastructure-intensive things you can do in an apartment renovation. Getting plumbing to a location far from the existing stack can be significantly more expensive than converting a room adjacent to existing plumbing.
Half-bath vs full bathroom
A half-bath (toilet and sink) solves the guest problem and the morning bottleneck problem for most households. It requires less space and significantly less plumbing infrastructure than a full bathroom. If the goal is guest use or overflow capacity, a half-bath often provides 80% of the benefit at 40% of the cost.
Effect on resale value
In apartments where a second bathroom is unusual (older buildings, smaller units), adding one can meaningfully increase market value. In apartments where it is expected (large units in newer buildings), not having one can be a disadvantage. Research what comparable apartments in your building and neighborhood typically have.
This is one of the most common renovation dilemmas people share on Floorlyst. If you are weighing this decision, you can see how others in similar layouts approached it, what they gave up, and whether they would make the same choice again.
Explore floor plans on Floorlyst →Frequently Asked Questions
How much space do you need for a second bathroom?
A half-bath (toilet and sink) can work in 3sqm. A shower room (toilet, sink, shower) needs at least 4–5sqm. A full bathroom with a bathtub needs 6sqm+.
How much does it cost to add a second bathroom?
A full bathroom addition is one of the most expensive single renovations per square meter. A half-bath is significantly cheaper. Cost depends heavily on how far the new bathroom is from the existing plumbing stack.
Does a second bathroom add value to an apartment?
In most markets, yes. Particularly if the apartment is large enough that buyers would expect one. In smaller apartments, a second bathroom that sacrifices too much living space may not be valued positively by buyers.
Can I add a bathroom without touching the plumbing stack?
Generally no — toilets and showers require connection to the drain stack. The cost goes up significantly the further the new bathroom is from existing plumbing. Always consult a plumber before planning bathroom location.
Is a half-bath worth it?
Often yes, particularly for households with guests or three or more people. A half-bath takes less space, costs less, and solves many of the practical problems a second bathroom is meant to address.
What should I convert to make a second bathroom?
Prioritize spaces adjacent to existing plumbing. A large closet near the kitchen or main bathroom is the best candidate. Converting a bedroom creates a bigger space but at a higher cost in liveable area.